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NEET 2019 · YDSE: Fringe Width & Fringe Positions

YDSE: Fringe Width & Fringe Positions question from NEET 2019

Q67NEET 2019Easy

YDSE: Fringe Width & Fringe Positions

In a Young's double slit experiment, if there is no initial phase difference between the light from the two slits, a point on the screen corresponding to the fifth minimum has path difference

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Answer: (d)

$n$ th minimum: path difference $= \frac{(2n-1)\lambda}{2}$
For $n = 5$ : $\frac{9\lambda}{2}$
So the answer is (d) $\frac{9\lambda}{2}$ .

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